CN203772704U - Prompting device for reinforcing steel bar rusting and chloride ion concentration limit state - Google Patents
Prompting device for reinforcing steel bar rusting and chloride ion concentration limit state Download PDFInfo
- Publication number
- CN203772704U CN203772704U CN201420183478.8U CN201420183478U CN203772704U CN 203772704 U CN203772704 U CN 203772704U CN 201420183478 U CN201420183478 U CN 201420183478U CN 203772704 U CN203772704 U CN 203772704U
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- China
- Prior art keywords
- ion concentration
- string wire
- rust
- limit state
- chlorine ion
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Abstract
The utility model discloses a prompting device for reinforcing steel bar rusting and chloride ion concentration limit state. The prompting device comprises a rusting test piece, a bow rack and a test piece tension adjuster, wherein the rusting test piece is a string wire which is tightened by the bow rack, one end of the string wire is fixed at one end of the bow rack, and the other end of the string wire is fixed at the other end of the bow rack through the test piece tension adjuster. The prompting device is placed in a corrosive environment, when the string wire is broken and the bow rack bounces off, the situations that the reinforcing steel bar rusts and chloride ion concentration limit state is reached are prompted. The prompting device disclosed by the utility model is simple in structure, and easy and convenient to test, can timely prompt the occurrence of events such as reinforcing steel bar rusting and chloride ion concentration limit state, can be used for researching the rusting time of reinforcing steel bars in different corrosive environments and the distribution rule of critical chloride ion concentration, and also can be used for researching the influence of stress effect on corrosion resistance of the reinforcing steel bars.
Description
[technical field]
The utility model relates to the analysis of reinforced concrete structure service reliability, relate in particular to a kind of under stress corrosion effect reinforcing bar play rust and the suggestion device of chlorine ion concentration ultimate limit state.
[background technology]
In seawater and deicer salts environment, it is the main cause of xoncrete structure performance degradation that chlorion triggers steel bar corrosion.Effectively identification reinforcing bar plays the generation of rust event, obtains the criticality chlorine ion concentration that reinforcing bar plays the rust time and triggers steel bar corrosion, is the key technical problem of reinforced concrete, the analysis of prestressed reinforced concrete structure service reliability and life-cycle assessment.
Ultimate limit state and reinforcing bar that rebar surface chlorion reaches critical concentration play rust, can be considered to two simultaneous events of following.Usually, criticality chlorine ion concentration is defined as making the surperficial chlorine ion concentration of removing blunt of reinforcing steel bar; It is the pitting potential that corrosion potential has exceeded reinforcing bar that reinforcing bar plays rust.By above-mentioned definition, derive many reinforcing bars and rise characteristic index and the method for rust and criticality chlorine ion concentration, as anode polarization, corrosion potential, current density, resistivity measurement etc.
Existing expert has been developed dependence test technology.Disclosed Chinese utility model patent application on June 15th, 2011 " a kind of method for monitoring corrosion cracks of reinforced concrete and sensor " (publication number CN102095677A), disclosed Chinese utility model patent application on November 27th, 2013 " reinforcing steel corrosion monitoring sensor of wide range based on fiber grating sensing technology " (publication number CN103411713A), disclosed Chinese utility model patent application on November 9 " steel bar corrosion time predicting device " (publication number CN202033274U) in 2011, all can be used for the identification that reinforcing bar plays corrosion event, but these monitoring steel bar corrosion methods all need the routine test of specific indexes, data-switching and deduction indirectly, in practice, operation is easy not.
[summary of the invention]
The technical problems to be solved in the utility model is to provide a kind of simple in structure, test easy, accurately reflect that reinforcing bar plays the suggestion device of rust and chlorine ion concentration ultimate limit state.
In order to solve the problems of the technologies described above, the technical solution adopted in the utility model is, a kind of reinforcing bar plays the suggestion device of rust and chlorine ion concentration ultimate limit state, comprised rust test specimen, shelf and test specimen tensioning device, and described the rising test specimen that becomes rusty is string wire; String wire is tightened by shelf, and one end of string wire is fixed on one end of shelf, and the other end of string wire is fixed on the other end of shelf by test specimen tensioning device.
Above-described reinforcing bar plays the suggestion device of rust and chlorine ion concentration ultimate limit state, and described string wire is the spring steel wire that diameter is not more than 0.16mm.
Above-described reinforcing bar plays the suggestion device of rust and chlorine ion concentration ultimate limit state, comprises cement paste test block or concrete test block, and the middle part of string wire is imbedded in cement paste test block or concrete test block.
Above-described reinforcing bar plays the suggestion device of rust and chlorine ion concentration ultimate limit state, comprises warning circuit, and warning circuit comprises power supply and pilot lamp, power supply and pilot lamp series connection; The two ends of warning circuit are electrically connected with the two ends of string wire respectively.
Above-described reinforcing bar plays the suggestion device of rust and chlorine ion concentration ultimate limit state, described shelf is bending stainless steel bar shaped plate, one end of stainless steel bar shaped plate comprises mounting hole, tension adjusting device comprises set screw and nut, set screw is through described mounting hole, the other end of string wire is fixed on the inner of set screw, and described nut screws the outer end in set screw.
The utility model apparatus structure is simple, it is easy to test, can reflect exactly that reinforcing bar plays rust and chlorine ion concentration ultimate limit state, rust time and the criticality chlorine ion concentration regularity of distribution that not only can be used for studying different corrosion environment reinforcing bars, also can be used for studying the impact of effect of stress on reinforcing bar corrosion resistance.
[brief description of the drawings]
Below in conjunction with the drawings and specific embodiments, the utility model is described in further detail.
Fig. 1 is the structural representation that the utility model embodiment 1 reinforcing bar plays rust and chlorine ion concentration ultimate limit state suggestion device.
Fig. 2 is the structural representation that the utility model embodiment 2 reinforcing bars play rust and chlorine ion concentration ultimate limit state suggestion device.
Fig. 3 is the structural representation that the utility model embodiment 3 reinforcing bars play rust and chlorine ion concentration ultimate limit state suggestion device.
Fig. 4 is the structural representation of the utility model embodiment 4 stress calibrating installations.
[embodiment]
The structure that the reinforcing bar of the utility model embodiment 1 plays rust and the suggestion device of chlorine ion concentration ultimate limit state as shown in Figure 1, comprises string wire 2, shelf 1, tension adjustment screw 3 and tension adjustment nut 4.
In the present embodiment, string wire 2 has been rust test specimens, and string wire 2 is tightened by shelf 1.String wire 2 can adopt high-strength very thin steel wire, and diameter is not more than the spring steel wire of 0.16mm.
Shelf 1 use stainless steel bar shaped plate bending forms, and respectively there is a mounting hole at the two ends of stainless steel bar shaped plate.Pin 8 is through the mounting hole of stainless steel bar shaped plate left end, and the left end of string wire 2 is fixed on the end of pin 8; Tension adjustment screw 3 is through the mounting hole of stainless steel bar shaped plate right-hand member, the right-hand member of string wire 2 is fixed on the inner of tension adjustment screw 3, tension adjustment nut 4 screws in the outer end of tension adjustment screw 3, and rotating tension adjusting nut 4 can be adjusted the flexibility of shelf 1, changes the tension force of string wire 2 simultaneously.Stretch-draw string wire 2 is during to predetermined stress value, then uses clamp nut 5 fixed adjustment nuts 4, and bending stainless steel substrates 1 maintains and stablizes lasting tension string wire.
Selected steel wire string corrosion test section (the each 30mm in optional mid point left and right or definite according to the actual requirements), and the remainder of steel wire string is added and is coated with rust inhibiting primer (red lead, epoxy zinc-rich paint etc.).
Reinforcing bar for exposed reinforcement or employing reinforcing steel method plays rust and criticality chlorine ion concentration research, above-mentioned reinforcing bar can be played to the suggestion device of rust and chlorine ion concentration ultimate limit state, be placed on (as maybe needed in corrosion environment simulation box in the reinforced concrete actual working environment of monitoring) in corrosion environment, when string wire 2 ruptures, when shelf 1 flicks, prompting reinforcing bar plays rust, reaches chlorine ion concentration ultimate limit state.
The utility model is by the string wire disconnected rust event that rises that characterizes tension reinforcement and the chlorine ion concentration state that reaches capacity that becomes rusty, maintaining by stainless steel substrates the target tension that puts on string wire presets by the ultimate tensile strength (UTS) of string wire, and a little less than the latter, generally, the 0.75%-85% that the target stress of bowstring under trystate is its tensile strength.Once string wire corrosion also causes the faint damage in its cross section, there is rust disconnected.The method of the present embodiment not only can be used for studying rust time and a criticality chlorine ion concentration regularity of distribution of different corrosion environment reinforcing bars, also can be used for studying the impact of effect of stress on reinforcing bar corrosion resistance.
The utility model embodiment 2 reinforcing bars play rust and the structure of chlorine ion concentration ultimate limit state suggestion device as shown in Figure 2, on the basis of embodiment 1, increased cement paste test block (or concrete test block) 6, the middle part of string wire 2 is imbedded in cement paste test block (or concrete test block) 6.The reinforcing bar that the device of the present embodiment is mainly used in studying reinforcing bar in cement paste or concrete test block plays rust and criticality chlorine ion concentration, in steel wire string corrosion test segment limit, builds small size cement paste or concrete test block (as 60mm × 60mm × 60mm test cube) around string wire.Standard curing concrete sample when specifying the length of time, is placed in corrosion environment by arch unit and test block entirety.When string wire generation corrosion, cross section weaken and while disconnecting, arc stainless steel substrates resilience is opened, and significantly points out reinforcing bar to play rust, reaches chlorine ion concentration ultimate limit state.
The utility model embodiment 3 reinforcing bars play rust and the structure of chlorine ion concentration ultimate limit state suggestion device as shown in Figure 3, on the basis of embodiment 2, have increased warning circuit, and warning circuit comprises power supply B and pilot lamp L, power supply B and pilot lamp L series connection; The two ends of warning circuit are electrically connected with the two ends of string wire 2 respectively.When cement paste test block (or concrete test block) 6 dense, and the stress of string wire 2 is less, when string wire generation corrosion disconnects, but can not extract out from test block 6 more greatly because of surface corrosion resistance time, arc stainless steel substrates can not open in resilience, now the pilot lamp L of warning circuit extinguishes, and instruction string wire 2 reality disconnect, have reached reinforcing bar and have played rust and chlorine ion concentration ultimate limit state.
The calibrating installation of the utility model embodiment 4 string wire stress as shown in Figure 4, stress calibrating installation comprises that one end of spring balance 7, spring balance 7 is fixed on one end of described suggestion device shelf 1, and the other end of spring balance 7 is fixed on the other end of shelf 1 by described test specimen tensioning device; While calibrating the stress of string wire 2, according to the pulling force of the sectional area of string wire 2 and target Stress calculation string wire 2, the value of thrust that adjustment test specimen tensioning device shows spring balance 7 reaches the pulling force of string wire 2, measures the opening value B of shelf 1; Then as shown in Figure 1, the spring balance on shelf 17 is taken off and changes string wire 2, adjust test specimen tensioning device and make shelf 1 reach above-mentioned opening value B, bowstring 2 reaches target stress.
The utility model is above by a string wire disconnected rust event of tension reinforcement and the concentration of chlorion or other harmful ions state that reaches capacity that characterizes that become rusty, the utility model maintains by stainless steel substrates the target tension that puts on string wire and presets by the ultimate tensile strength (UTS) of string wire, and a little less than the latter; Once string wire corrosion also causes the faint damage in its cross section, there is rust disconnected.Analogue means and method not only can be used for studying rust time and a criticality chlorine ion concentration regularity of distribution of different corrosion environment reinforcing bars, also can be used for studying the impact of effect of stress on reinforcing bar corrosion resistance.
Claims (5)
1. reinforcing bar plays a suggestion device for rust and chlorine ion concentration ultimate limit state, has comprised rust test specimen, it is characterized in that, comprises shelf and test specimen tensioning device, and a described rust test specimen is string wire; String wire is tightened by shelf, and one end of string wire is fixed on one end of shelf, and the other end of string wire is fixed on the other end of shelf by test specimen tensioning device.
2. reinforcing bar according to claim 1 plays the suggestion device of rust and chlorine ion concentration ultimate limit state, it is characterized in that, described string wire is the spring steel wire that diameter is not more than 0.16mm.
3. reinforcing bar according to claim 1 plays the suggestion device of rust and chlorine ion concentration ultimate limit state, it is characterized in that, comprise cement paste test block or concrete test block, the middle part of string wire is imbedded in cement paste test block or concrete test block.
4. reinforcing bar according to claim 1 plays the suggestion device of rust and chlorine ion concentration ultimate limit state, it is characterized in that, comprise warning circuit, warning circuit comprises power supply and pilot lamp, power supply and pilot lamp series connection; The two ends of warning circuit are electrically connected with the two ends of string wire respectively.
5. reinforcing bar according to claim 1 plays the suggestion device of rust and chlorine ion concentration ultimate limit state, it is characterized in that, described shelf is bending stainless steel bar shaped plate, one end of stainless steel bar shaped plate comprises mounting hole, tension adjusting device comprises set screw and nut, set screw is through described mounting hole, and the other end of string wire is fixed on the inner of set screw, and described nut screws the outer end in set screw.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420183478.8U CN203772704U (en) | 2014-04-16 | 2014-04-16 | Prompting device for reinforcing steel bar rusting and chloride ion concentration limit state |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420183478.8U CN203772704U (en) | 2014-04-16 | 2014-04-16 | Prompting device for reinforcing steel bar rusting and chloride ion concentration limit state |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203772704U true CN203772704U (en) | 2014-08-13 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420183478.8U Withdrawn - After Issue CN203772704U (en) | 2014-04-16 | 2014-04-16 | Prompting device for reinforcing steel bar rusting and chloride ion concentration limit state |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203772704U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103983559A (en) * | 2014-04-16 | 2014-08-13 | 深圳大学 | Prompt apparatus and prompt method for reinforcing steel bar rusting and chloride ion concentration limit state |
-
2014
- 2014-04-16 CN CN201420183478.8U patent/CN203772704U/en not_active Withdrawn - After Issue
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103983559A (en) * | 2014-04-16 | 2014-08-13 | 深圳大学 | Prompt apparatus and prompt method for reinforcing steel bar rusting and chloride ion concentration limit state |
| CN103983559B (en) * | 2014-04-16 | 2016-07-13 | 深圳大学 | Reinforcing bar plays suggestion device and the reminding method of rust and chlorine ion concentration limit state |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20140813 Effective date of abandoning: 20160713 |
|
| C25 | Abandonment of patent right or utility model to avoid double patenting |